1919 School of Architecture established. Princeton's Army ROTC unit established.

1921 School of Engineering established.

1928 Princeton University Chapel dedicated.

1930 School of Public and International Affairs established (and named after Woodrow Wilson in 1948).

1933 Harold W. Dodds becomes 15th president. Albert Einstein becomes a life member of the Institute for Advanced Study, with an office on the Princeton University campus.

1940 Undergraduate radio station (then WPRU, now WPRB) founded.

1942 The first black undergraduate students are admitted.

1948 Firestone Library dedicated.

1949 Association of Graduate Princeton Alumni founded.

1951 Forrestal Campus established on U.S. Route 1; "Project Matter-horn" research in nuclear fusion begins there. In 1961, its name is changed to the Princeton Plasma Physics Laboratory (PPPL).

1954 Ivy League athletic conference founded, with Princeton as one of eight members.

1957 Robert F. Goheen installed as 16th president.

1960 Martin Luther King Jr. preaches at the University Chapel. Nassau Hall deemed a national historic landmark.

1964 Ph.D. degree awarded to a woman for the first time.

1969 Trustees vote to admit women undergraduates.

1970 Council of the Princeton University Community (CPUC), a deliberative body of faculty, students, staff and alumni, is established.

1971 Third World Center founded (in 2002, renamed the Carl A. Fields Center for Equality and Cultural Understanding, after an African American assistant dean of the college from 1968-71). Women's Center founded.

1972 William G. Bowen becomes 17th president.

1974 International Center (now the Davis International Center) founded.

1982 System of residential colleges established.

1988 Harold T. Shapiro installed as 18th president.

1994 Center for Jewish Life founded.

1996 250th anniversary celebrated. Princeton's informal motto expanded by President Shapiro to "In the Nation's Service and in the Service of All Nations."

1998 First major steps undertaken to overhaul financial aid policies, making Princeton more affordable.

2003 Lewis-Sigler Institute for Integrative Genomics dedicated with a mandate to focus on research and teaching at the interface of biology and the quantitative sciences. Princeton Prize in Race Relations founded to promote understanding among high school-age students.

2006 University Center for the Creative and Performing ArtsÂ (renamed the Peter B. Lewis Center for the Arts in 2007) and Office of Sustainability established. Center for African American Studies established, expanding program begun in 1969.

2007 Four-year residential college system launched with the opening of Whitman College.

2008 Andlinger Center for Energy and the Environment established. Lewis Library, designed by Frank Gehry and consolidating science collections, completed.

2009 Bridge Year Program begins with 20 students deferring admission for one year to engage in international service. Butler College reopens with new dormitories, completing the University's transition to a four-year residential college system.

2010 Frick Chemistry Laboratory, the largest single academic building on campus excluding Firestone Library, opens; Streicker Bridge opens, connecting the two sides of the science neighborhood across Washington Road.

2012 A five-year campaign, "Aspire: A Plan for Princeton," concludes under President Shirley M. Tilghman, after raising $1.88 billion.

2013 Christopher L. Eisgruber becomes Princeton's 20th president.

2014 Opening of Peretsman Scully Hall, the new home of the Department of Psychology, and the Princeton Neuroscience Institute.